function showSubgroups(){
	campaign_list = document.getElementById("campaignid");
	campaign_selected = campaign_list.options[campaign_list.selectedIndex].value;
	
	
	var rows=document.getElementsByTagName("tr");
	for (var i=0; i<rows.length; i++){
		cid = rows[i].getAttribute("campaign");
		if(cid==null)
			continue;
			
		if(cid == campaign_selected){
			rows[i].setAttribute("class","");
			rows[i].getElementsByTagName("select")[0].setAttribute("name","group");
		}else if(cid > 0){
			rows[i].setAttribute("class","hidden");
			rows[i].getElementsByTagName("select")[0].setAttribute("name","");
		}
	}
	
	
}

window.onload = function(){ c=document.getElementById("campaignid"); if(c) { c.onchange = showSubgroups; showSubgroups(); }};